Multiple choice

One type of liquid contains 25% of acid, the other contains 30% of acid. A container is filled with 6 parts of the first liquid and 4 parts of the second liquid. The percentage of acid in the mixture is एक प्रकार के द्रव में 25% अम्ल है, दूसरे में 30% अम्ल है | एक पात्र को पहले प्रकार के द्रव के 6 भाग से तथा दूसरे प्रकार के द्रव के 4 भाग से भरा जाता है | मिश्रण में अम्ल की प्रतिशत मात्रा है

  1. 27%

  2. 31%

  3. 29%

  4. 33%

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Simple interest = P × R × T/100. 5400 = 11250 × R × 4/100, giving R = 12% per year. For compound interest: Amount = 11250(1 + 0.12)² = 11250 × 1.2544 = Rs.14112. CI = 14112 - 11250 = Rs.2862.